package com.mune.gulimall.product.service.impl;

import org.springframework.stereotype.Service;

import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.mune.common.utils.PageUtils;
import com.mune.common.utils.Query;

import com.mune.gulimall.product.dao.ProductAttrValueDao;
import com.mune.gulimall.product.entity.ProductAttrValueEntity;
import com.mune.gulimall.product.service.ProductAttrValueService;
import org.springframework.transaction.annotation.Transactional;


@Service("productAttrValueService")
public class ProductAttrValueServiceImpl extends ServiceImpl<ProductAttrValueDao, ProductAttrValueEntity> implements ProductAttrValueService {

  @Override
  public PageUtils queryPage(Map<String, Object> params) {
    IPage<ProductAttrValueEntity> page = this.page(
            new Query<ProductAttrValueEntity>().getPage(params),
            new QueryWrapper<ProductAttrValueEntity>()
    );

    return new PageUtils(page);
  }

  @Override
  public void saveProductAttr(List<ProductAttrValueEntity> collect) {
    this.saveBatch(collect);
  }

  @Override
  public List<ProductAttrValueEntity> baseAttrListForSpu(Long spuId) {
    List<ProductAttrValueEntity> entities = this.baseMapper.selectList(new QueryWrapper<ProductAttrValueEntity>().eq("spu_id", spuId));
    return entities;
  }

  @Transactional
  @Override
  public void updateSpuAttr(Long spuId, List<ProductAttrValueEntity> entities) {
    // 删除spu之前对应的所有属性
    this.baseMapper.delete(new QueryWrapper<ProductAttrValueEntity>().eq("spu_id", spuId));

    List<ProductAttrValueEntity> collect = entities.stream().map(item -> {
      item.setSpuId(spuId);
      return item;
    }).collect(Collectors.toList());
    this.saveBatch(collect);
  }

}